Where does “tirapugni” come from?

tirapugni (Italian) comes from Italian pugno, from Latin pūgnus, from Proto-Italic pugnos, from Proto-Indo-European puǵnos, from Proto-Indo-European pewǵ- — to punch, fist-fight; to prick, poke, stab.

tirapugni (Italian): brass knuckles, knuckle duster

Definitions

brass knuckles, knuckle duster

Ancestry of “tirapugni”, step by step

tirapugni traces back through two separate lines of ancestry.

via Italian pugno

Step	Language	Word	Meaning
1	Italian	pugno	fist; punch; fistful, handful
2	Latin	pūgnus	a fist; a hand with all fingers curled up
3	Proto-Italic	pugnos	fist
4	Proto-Indo-European	puǵnos	—
5	Proto-Indo-European	pewǵ-	to punch, fist-fight; to prick, poke, stab

via Italian tirare

Step	Language	Word	Meaning
1	Italian	tirare	to pull, draw, tug, drag; to throw, shoot, toss,...
2	Vulgar Latin	*tīrāre	—

Every word from Proto-Indo-European pewǵ- →Every word from Proto-Indo-European puǵnos →Every word from Proto-Italic pugnos →